:orphan:

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.. dtcompatible:: fixed-subpartitions
.. _dtbinding_fixed_subpartitions:

fixed-subpartitions
###################

Vendor: :ref:`Generic or vendor-independent <dt_no_vendor>`

Description
***********



.. code-block:: none

   Fixed subpartitions of a flash (or other nonvolatile storage) memory.

   Here is an example:

     &flash0 {
             partitions {
                     compatible = "fixed-partitions";
                     #address-cells = <1>;
                     #size-cells = <1>;

                     slot0_partition: partition@10000 {
                             compatible = "fixed-subpartitions";
                             label = "image-0";
                             reg = <0x00010000 0x70000>;
                             ranges = <0x0 0x10000 0x70000>;
                             #address-cells = <1>;
                             #size-cells = <1>;

                             slot0_s_partition: partition@0 {
                                     label = "image-0-secure";
                                     reg = <0x00000000 0x40000>;
                             };

                             slot0_ns_partition: partition@40000 {
                                     label = "image-0-nonsecure";
                                     reg = <0x00040000 0x30000>;
                             };
                     };
             };
     };

Properties
**********

Top level properties
====================


These property descriptions apply to "fixed-subpartitions"
nodes themselves. This page also describes child node
properties in the following sections.

.. tabs::

   .. group-tab:: Node specific properties

      Properties not inherited from the base binding file.

      .. list-table::
         :widths: 1 1 4
         :header-rows: 1

         * - Name
           - Type
           - Details

         * - ``read-only``
           - ``boolean``
           - .. code-block:: none

                set this property if the partition is read-only




   .. group-tab:: Deprecated node specific properties

      Deprecated properties not inherited from the base binding file.

      (None)

   .. group-tab:: Base properties

      Properties inherited from the base binding file, which defines
      common properties that may be set on many nodes. Not all of these
      may apply to the "fixed-subpartitions" compatible.

      .. list-table::
         :widths: 1 1 4
         :header-rows: 1

         * - Name
           - Type
           - Details

         * - ``label``
           - ``string``
           - .. code-block:: none

                Human readable string describing the flash partition.



             See :ref:`zephyr:dt-important-props` for more information.

         * - ``reg``
           - ``array``
           - .. code-block:: none

                This should be in the format <OFFSET SIZE>, where OFFSET
                is the offset of the flash partition relative to the base
                address of the parent memory, and SIZE is the size of
                the partition in bytes.



             This property is **required**.

             See :ref:`zephyr:dt-important-props` for more information.

         * - ``#address-cells``
           - ``int``
           - .. code-block:: none

                Number of cells required to represent a child node's
                reg property address. This must be large enough to
                represent the start offset of each partition.



         * - ``#size-cells``
           - ``int``
           - .. code-block:: none

                Number of cells required to represent a child node's
                reg property address. This must be large enough to
                represent the size of each partition in bytes.






Child node properties
=====================

.. list-table::
   :widths: 1 1 4
   :header-rows: 1

   * - Name
     - Type
     - Details

   * - ``label``
     - ``string``
     - .. code-block:: none

          Human readable string describing the flash partition.



       See :ref:`zephyr:dt-important-props` for more information.

   * - ``read-only``
     - ``boolean``
     - .. code-block:: none

          set this property if the partition is read-only


   * - ``reg``
     - ``array``
     - .. code-block:: none

          This should be in the format <OFFSET SIZE>, where OFFSET
          is the offset of the flash partition relative to the base
          address of the parent memory, and SIZE is the size of
          the partition in bytes.



       This property is **required**.

       See :ref:`zephyr:dt-important-props` for more information.